Add script to delete pipeline runs from tekton.

ansible/roles/kubernetes/files/k8s_delete_pipeline_runs

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+#
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+kubectl get pipelinerun --all-namespaces -o go-template='{{range .items}}{{.metadata.namespace}}/{{.metadata.name}}{{"\n"}}{{end}}' | while read p; do namespace=$(cut -d '/' -f 1 <<<"$p"); name=$(cut -d '/' -f 2 <<<"$p"); kubectl delete pipelinerun -n "$namespace" "$name"; done